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Dr. Hung-Sheng Tsao's Weblog

Solaris 9 Tuning parameters change

Each version of Solaris Change some default parameters in Solaris kernel
Those changes, should be documented in the release note, but AFAIK is not..
They are documented in the document Solaris Tuunable Parameters Reference Manual
Here let's discuss few of them on Appendix

maxusers

Range 1 to 2048
to: Range 1 to 2048, based on physical
memory without any setting in the /etc/system file.
1 to 4096, if set in the /etc/system file.

rlim_fd_max

Default 1024
to: Default 65,536

shmsys:shminfo_shmseg

Limit on the number
of shared memory segments that any one process can attach.